I agree with you in general, still at some companies installing from source might not be an option. And it might also implode on you, if you then have to search for dependencies of dependencies of dependencies ....
Especially on older LTS distros this can be quite some work, and you tend to get stuck at certain dependency incompatibilites.
People tend to accept building custom versions of depending libraries though. In my experience this acceptance get's a lot smaller with the general build environment though.
Don't take this discussion the wrong way, as I said I was just wondering if it is generally something we should talk about. In no way would I want to force the autotools to certain version.
But please update the dependency pages in the wiki and the developer documentation with the required version, so that maintainer can take the new version into account.
cheers